using System;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace AC.ExtendedRenderer.Toolkit.Utils
{
	internal class Win32
	{
		/*
		 * GetWindow() Constants
		 */
		public const int GW_HWNDFIRST			= 0;
		public const int GW_HWNDLAST			= 1;
		public const int GW_HWNDNEXT			= 2;
		public const int GW_HWNDPREV			= 3;
		public const int GW_OWNER				= 4;
		public const int GW_CHILD				= 5;

		public const int WM_NCCALCSIZE			= 0x83;
		public const int WM_WINDOWPOSCHANGING	= 0x46;
		public const int WM_PAINT				= 0xF;
		public const int WM_CREATE				= 0x1;
		public const int WM_NCCREATE			= 0x81;
		public const int WM_NCPAINT				= 0x85;
		public const int WM_PRINT				= 0x317;
		public const int WM_DESTROY				= 0x2;
		public const int WM_SHOWWINDOW			= 0x18;
		public const int WM_SHARED_MENU			= 0x1E2;
		public const int WH_CALLWNDPROC			= 4;
        public const int WM_PARENTNOTIFY        = 0x210;
        public const int WM_HSCROLL             = 0x114;
        public const int WM_NCHITTEST           = 0x84;
        public const int WM_ERASEBKGND = 0x0014; // WM_ERASEBKGND message
        
        public const int HC_ACTION = 0;
        public const int GWL_WNDPROC = -4;

		public Win32()
		{
			//
			// TODO: Add constructor logic here
			//
		}


        [DllImport("User32", CallingConvention = CallingConvention.Cdecl)]
        public static extern int RealGetWindowClass(IntPtr hwnd, System.Text.StringBuilder pszType, int cchType);

        [DllImport("user32")]
        public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

        [DllImport("user32.dll")]
        public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);


        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr SetClipboardViewer(IntPtr hWnd);

        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern bool ChangeClipboardChain(
            IntPtr hWndRemove,  // handle to window to remove
            IntPtr hWndNewNext  // handle to next window
            );

        [DllImport("user32.dll")]
        public static extern IntPtr GetDCEx(IntPtr hwnd, IntPtr hrgnclip, uint fdwOptions);

        [DllImport("user32.dll")]
        public static extern int ReleaseDC(IntPtr hwnd, IntPtr hDC);


		[DllImport("User32.dll",CharSet = CharSet.Auto)]
		public static extern IntPtr GetWindowDC(IntPtr handle);

		[DllImport("Gdi32.dll",CharSet = CharSet.Auto)]
		public static extern IntPtr CreateCompatibleDC(IntPtr hdc);

		[DllImport("User32.dll",CharSet = CharSet.Auto)]
		public static extern int GetClassName(IntPtr hwnd, char[] className, int maxCount);

		[DllImport("User32.dll",CharSet = CharSet.Auto)]
		public static extern IntPtr GetWindow(IntPtr hwnd, int uCmd);

		[DllImport("User32.dll",CharSet = CharSet.Auto)]
		public static extern bool IsWindowVisible(IntPtr hwnd);

		[DllImport("user32",CharSet = CharSet.Auto)]
		public static extern int GetClientRect(IntPtr hwnd, ref RECT lpRect);

		[DllImport("user32",CharSet = CharSet.Auto)]
		public static extern int GetClientRect(IntPtr hwnd, [In, Out] ref Rectangle rect);

		[DllImport("user32",CharSet = CharSet.Auto)]
		public static extern bool MoveWindow(IntPtr hwnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

		[DllImport("user32",CharSet = CharSet.Auto)]
		public static extern bool UpdateWindow(IntPtr hwnd);

		[DllImport("user32",CharSet = CharSet.Auto)]
		public static extern bool InvalidateRect(IntPtr hwnd, ref Rectangle rect, bool bErase);

		[DllImport("user32",CharSet = CharSet.Auto)]
		public static extern bool ValidateRect(IntPtr hwnd, ref Rectangle rect);

		[DllImport("user32.dll",CharSet = CharSet.Auto)]
		internal static extern bool GetWindowRect(IntPtr hWnd, [In, Out] ref Rectangle rect);

        [DllImport("uxtheme.dll", ExactSpelling = true, CharSet = CharSet.Unicode)]
        public static extern int SetWindowTheme(IntPtr hWnd, String pszSubAppName, String pszSubIdList);

        [DllImport("uxtheme.dll", ExactSpelling = true, CharSet = CharSet.Unicode)]
        public static extern int SetWindowTheme(IntPtr hWnd, int pszSubAppName, String pszSubIdList);

        [DllImport("uxtheme.dll", ExactSpelling = true, CharSet = CharSet.Unicode)]
        public static extern int SetWindowTheme(IntPtr hWnd, String pszSubAppName, int pszSubIdList);

        [DllImport("uxtheme.dll", ExactSpelling = true, CharSet = CharSet.Unicode)]
        public static extern int SetWindowTheme(IntPtr hWnd, int pszSubAppName, int pszSubIdList);

		[StructLayout(LayoutKind.Sequential)]
			public struct RECT 
		{
			public int Left;
			public int Top;
			public int Right;
			public int Bottom;
		}

		[StructLayout(LayoutKind.Sequential)]
		public struct WINDOWPOS
		{
			public IntPtr hwnd;
			public IntPtr hwndAfter;
			public int x;
			public int y;
			public int cx;
			public int cy;
			public uint flags;
		}

		[StructLayout(LayoutKind.Sequential)]
			public struct NCCALCSIZE_PARAMS
		{
			public RECT rgc;
			public WINDOWPOS wndpos;
		}
	}

    /// <summary>
    /// Windows Event Messages sent to the WindowProc
    /// </summary>
    public enum Msgs
    {
        WM_NULL = 0x0000,
        WM_CREATE = 0x0001,
        WM_DESTROY = 0x0002,
        WM_MOVE = 0x0003,
        WM_SIZE = 0x0005,
        WM_ACTIVATE = 0x0006,
        WM_SETFOCUS = 0x0007,
        WM_KILLFOCUS = 0x0008,
        WM_ENABLE = 0x000A,
        WM_SETREDRAW = 0x000B,
        WM_SETTEXT = 0x000C,
        WM_GETTEXT = 0x000D,
        WM_GETTEXTLENGTH = 0x000E,
        WM_PAINT = 0x000F,
        WM_CLOSE = 0x0010,
        WM_QUERYENDSESSION = 0x0011,
        WM_QUIT = 0x0012,
        WM_QUERYOPEN = 0x0013,
        WM_ERASEBKGND = 0x0014,
        WM_SYSCOLORCHANGE = 0x0015,
        WM_ENDSESSION = 0x0016,
        WM_SHOWWINDOW = 0x0018,
        WM_WININICHANGE = 0x001A,
        WM_SETTINGCHANGE = 0x001A,
        WM_DEVMODECHANGE = 0x001B,
        WM_ACTIVATEAPP = 0x001C,
        WM_FONTCHANGE = 0x001D,
        WM_TIMECHANGE = 0x001E,
        WM_CANCELMODE = 0x001F,
        WM_SETCURSOR = 0x0020,
        WM_MOUSEACTIVATE = 0x0021,
        WM_CHILDACTIVATE = 0x0022,
        WM_QUEUESYNC = 0x0023,
        WM_GETMINMAXINFO = 0x0024,
        WM_PAINTICON = 0x0026,
        WM_ICONERASEBKGND = 0x0027,
        WM_NEXTDLGCTL = 0x0028,
        WM_SPOOLERSTATUS = 0x002A,
        WM_DRAWITEM = 0x002B,
        WM_MEASUREITEM = 0x002C,
        WM_DELETEITEM = 0x002D,
        WM_VKEYTOITEM = 0x002E,
        WM_CHARTOITEM = 0x002F,
        WM_SETFONT = 0x0030,
        WM_GETFONT = 0x0031,
        WM_SETHOTKEY = 0x0032,
        WM_GETHOTKEY = 0x0033,
        WM_QUERYDRAGICON = 0x0037,
        WM_COMPAREITEM = 0x0039,
        WM_GETOBJECT = 0x003D,
        WM_COMPACTING = 0x0041,
        WM_COMMNOTIFY = 0x0044,
        WM_WINDOWPOSCHANGING = 0x0046,
        WM_WINDOWPOSCHANGED = 0x0047,
        WM_POWER = 0x0048,
        WM_COPYDATA = 0x004A,
        WM_CANCELJOURNAL = 0x004B,
        WM_NOTIFY = 0x004E,
        WM_INPUTLANGCHANGEREQUEST = 0x0050,
        WM_INPUTLANGCHANGE = 0x0051,
        WM_TCARD = 0x0052,
        WM_HELP = 0x0053,
        WM_USERCHANGED = 0x0054,
        WM_NOTIFYFORMAT = 0x0055,
        WM_CONTEXTMENU = 0x007B,
        WM_STYLECHANGING = 0x007C,
        WM_STYLECHANGED = 0x007D,
        WM_DISPLAYCHANGE = 0x007E,
        WM_GETICON = 0x007F,
        WM_SETICON = 0x0080,
        WM_NCCREATE = 0x0081,
        WM_NCDESTROY = 0x0082,
        WM_NCCALCSIZE = 0x0083,
        WM_NCHITTEST = 0x0084,
        WM_NCPAINT = 0x0085,
        WM_NCACTIVATE = 0x0086,
        WM_GETDLGCODE = 0x0087,
        WM_SYNCPAINT = 0x0088,
        WM_NCMOUSEMOVE = 0x00A0,
        WM_NCLBUTTONDOWN = 0x00A1,
        WM_NCLBUTTONUP = 0x00A2,
        WM_NCLBUTTONDBLCLK = 0x00A3,
        WM_NCRBUTTONDOWN = 0x00A4,
        WM_NCRBUTTONUP = 0x00A5,
        WM_NCRBUTTONDBLCLK = 0x00A6,
        WM_NCMBUTTONDOWN = 0x00A7,
        WM_NCMBUTTONUP = 0x00A8,
        WM_NCMBUTTONDBLCLK = 0x00A9,
        WM_NCXBUTTONDOWN = 0x00AB,
        WM_NCXBUTTONUP = 0x00AC,
        WM_KEYDOWN = 0x0100,
        WM_KEYUP = 0x0101,
        WM_CHAR = 0x0102,
        WM_DEADCHAR = 0x0103,
        WM_SYSKEYDOWN = 0x0104,
        WM_SYSKEYUP = 0x0105,
        WM_SYSCHAR = 0x0106,
        WM_SYSDEADCHAR = 0x0107,
        WM_KEYLAST = 0x0108,
        WM_IME_STARTCOMPOSITION = 0x010D,
        WM_IME_ENDCOMPOSITION = 0x010E,
        WM_IME_COMPOSITION = 0x010F,
        WM_IME_KEYLAST = 0x010F,
        WM_INITDIALOG = 0x0110,
        WM_COMMAND = 0x0111,
        WM_SYSCOMMAND = 0x0112,
        WM_TIMER = 0x0113,
        WM_HSCROLL = 0x0114,
        WM_VSCROLL = 0x0115,
        WM_INITMENU = 0x0116,
        WM_INITMENUPOPUP = 0x0117,
        WM_MENUSELECT = 0x011F,
        WM_MENUCHAR = 0x0120,
        WM_ENTERIDLE = 0x0121,
        WM_MENURBUTTONUP = 0x0122,
        WM_MENUDRAG = 0x0123,
        WM_MENUGETOBJECT = 0x0124,
        WM_UNINITMENUPOPUP = 0x0125,
        WM_MENUCOMMAND = 0x0126,
        WM_CTLCOLORMSGBOX = 0x0132,
        WM_CTLCOLOREDIT = 0x0133,
        WM_CTLCOLORLISTBOX = 0x0134,
        WM_CTLCOLORBTN = 0x0135,
        WM_CTLCOLORDLG = 0x0136,
        WM_CTLCOLORSCROLLBAR = 0x0137,
        WM_CTLCOLORSTATIC = 0x0138,
        WM_MOUSEMOVE = 0x0200,
        WM_LBUTTONDOWN = 0x0201,
        WM_LBUTTONUP = 0x0202,
        WM_LBUTTONDBLCLK = 0x0203,
        WM_RBUTTONDOWN = 0x0204,
        WM_RBUTTONUP = 0x0205,
        WM_RBUTTONDBLCLK = 0x0206,
        WM_MBUTTONDOWN = 0x0207,
        WM_MBUTTONUP = 0x0208,
        WM_MBUTTONDBLCLK = 0x0209,
        WM_MOUSEWHEEL = 0x020A,
        WM_XBUTTONDOWN = 0x020B,
        WM_XBUTTONUP = 0x020C,
        WM_XBUTTONDBLCLK = 0x020D,
        WM_PARENTNOTIFY = 0x0210,
        WM_ENTERMENULOOP = 0x0211,
        WM_EXITMENULOOP = 0x0212,
        WM_NEXTMENU = 0x0213,
        WM_SIZING = 0x0214,
        WM_CAPTURECHANGED = 0x0215,
        WM_MOVING = 0x0216,
        WM_DEVICECHANGE = 0x0219,
        WM_MDICREATE = 0x0220,
        WM_MDIDESTROY = 0x0221,
        WM_MDIACTIVATE = 0x0222,
        WM_MDIRESTORE = 0x0223,
        WM_MDINEXT = 0x0224,
        WM_MDIMAXIMIZE = 0x0225,
        WM_MDITILE = 0x0226,
        WM_MDICASCADE = 0x0227,
        WM_MDIICONARRANGE = 0x0228,
        WM_MDIGETACTIVE = 0x0229,
        WM_MDISETMENU = 0x0230,
        WM_ENTERSIZEMOVE = 0x0231,
        WM_EXITSIZEMOVE = 0x0232,
        WM_DROPFILES = 0x0233,
        WM_MDIREFRESHMENU = 0x0234,
        WM_IME_SETCONTEXT = 0x0281,
        WM_IME_NOTIFY = 0x0282,
        WM_IME_CONTROL = 0x0283,
        WM_IME_COMPOSITIONFULL = 0x0284,
        WM_IME_SELECT = 0x0285,
        WM_IME_CHAR = 0x0286,
        WM_IME_REQUEST = 0x0288,
        WM_IME_KEYDOWN = 0x0290,
        WM_IME_KEYUP = 0x0291,
        WM_MOUSEHOVER = 0x02A1,
        WM_MOUSELEAVE = 0x02A3,
        WM_CUT = 0x0300,
        WM_COPY = 0x0301,
        WM_PASTE = 0x0302,
        WM_CLEAR = 0x0303,
        WM_UNDO = 0x0304,
        WM_RENDERFORMAT = 0x0305,
        WM_RENDERALLFORMATS = 0x0306,
        WM_DESTROYCLIPBOARD = 0x0307,
        WM_DRAWCLIPBOARD = 0x0308,
        WM_PAINTCLIPBOARD = 0x0309,
        WM_VSCROLLCLIPBOARD = 0x030A,
        WM_SIZECLIPBOARD = 0x030B,
        WM_ASKCBFORMATNAME = 0x030C,
        WM_CHANGECBCHAIN = 0x030D,
        WM_HSCROLLCLIPBOARD = 0x030E,
        WM_QUERYNEWPALETTE = 0x030F,
        WM_PALETTEISCHANGING = 0x0310,
        WM_PALETTECHANGED = 0x0311,
        WM_HOTKEY = 0x0312,
        WM_PRINT = 0x0317,
        WM_PRINTCLIENT = 0x0318,
        WM_HANDHELDFIRST = 0x0358,
        WM_HANDHELDLAST = 0x035F,
        WM_AFXFIRST = 0x0360,
        WM_AFXLAST = 0x037F,
        WM_PENWINFIRST = 0x0380,
        WM_PENWINLAST = 0x038F,
        WM_APP = 0x8000,
        WM_USER = 0x0400,

        // For Windows XP Balloon messages from the System Notification Area
        NIN_BALLOONSHOW = 0x0402,
        NIN_BALLOONHIDE = 0x0403,
        NIN_BALLOONTIMEOUT = 0x0404,
        NIN_BALLOONUSERCLICK = 0x0405
    }

	#region SubClass Classing Handler Class
	internal class SubClass : System.Windows.Forms.NativeWindow
	{
		public delegate int SubClassWndProcEventHandler(ref System.Windows.Forms.Message m);
		public event SubClassWndProcEventHandler SubClassedWndProc;
		private bool IsSubClassed = false;

		public SubClass(IntPtr Handle, bool _SubClass)
		{
			base.AssignHandle(Handle);
			this.IsSubClassed = _SubClass;
		}

		public bool SubClassed
		{
			get{ return this.IsSubClassed; }
			set{ this.IsSubClassed = value; }
		}

		protected override void WndProc(ref Message m) 
		{
			if (this.IsSubClassed)
			{
				if (OnSubClassedWndProc(ref m) != 0)
					return;
			}
			base.WndProc(ref m);
		}

		public void CallDefaultWndProc(ref Message m)
		{
			base.WndProc(ref m);
		}

		#region HiWord Message Cracker
		public int HiWord(int Number) 
		{
			return ((Number >> 16) & 0xffff);
		}
		#endregion

		#region LoWord Message Cracker
		public int LoWord(int Number) 
		{
			return (Number & 0xffff);
		}
		#endregion

		#region MakeLong Message Cracker
		public int MakeLong(int LoWord, int HiWord) 
		{ 
			return (HiWord << 16) | (LoWord & 0xffff); 
		} 
		#endregion
 
		#region MakeLParam Message Cracker
		public IntPtr MakeLParam(int LoWord, int HiWord) 
		{ 
			return (IntPtr) ((HiWord << 16) | (LoWord & 0xffff)); 
		} 
		#endregion

		private int OnSubClassedWndProc(ref Message m)
		{
			if (SubClassedWndProc != null)
			{
				return this.SubClassedWndProc(ref m);
			}

			return 0;
		}
	}
	#endregion
}
